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  <time datetime="2019-07-24T05:20:50.000Z" itemprop="datePublished">2019-07-24</time>
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      HTML基础知识点-表格
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<h2 id="知识点"><a href="#知识点" class="headerlink" title="知识点"></a>知识点</h2><ul>
<li><p><code>&lt;table&gt;</code>：表格</p>
</li>
<li><p><code>&lt;tr&gt;</code>：行</p>
</li>
<li><p><code>&lt;td&gt;</code>：单元格</p>
</li>
</ul>
<h2 id="带结构的表格"><a href="#带结构的表格" class="headerlink" title="带结构的表格"></a>带结构的表格</h2><p>表格划分三部分：表头，主体，脚注</p>
<p>加载时可以逐个结构加载</p>
<ul>
<li><p>thead：表格的头（放表格的表头）</p>
</li>
<li><p>tbody：表格的主体（放数据本体）</p>
</li>
<li><p>tfoot：表格的脚（放表格的脚注）</p>
</li>
</ul>
<p>无论这三个标签的位置如何变化，总是先显示<code>&lt;thead&gt;</code>，然后才是<code>&lt;tbody&gt;</code>，最后是<code>&lt;tfoot&gt;</code></p>
<p>例：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br></pre></td><td class="code"><pre><span class="line">&lt;table&gt;                                 //表格开始</span><br><span class="line">    &lt;caption&gt;...&lt;/caption&gt;              //表格标题</span><br><span class="line">    &lt;thead&gt;</span><br><span class="line">        &lt;tr&gt;                            //tr行标签</span><br><span class="line">            &lt;th&gt;表头&lt;/th&gt;               //表格头，内容居中，加粗显示</span><br><span class="line">            ...</span><br><span class="line">        &lt;/tr&gt;</span><br><span class="line">    &lt;/thead&gt; </span><br><span class="line">    &lt;tbody&gt;</span><br><span class="line">        &lt;tr&gt;</span><br><span class="line">            &lt;td&gt;主体&lt;/td&gt;               //td单元格，默认</span><br><span class="line">            ...</span><br><span class="line">        &lt;/tr&gt;</span><br><span class="line">    &lt;/tbody&gt;</span><br><span class="line">    &lt;tfoot&gt;</span><br><span class="line">        &lt;tr&gt;</span><br><span class="line">            &lt;td&gt;脚注&lt;/td&gt;                        </span><br><span class="line">            ...</span><br><span class="line">        &lt;/tr&gt;</span><br><span class="line">    &lt;/tfoot&gt;</span><br><span class="line">&lt;/table&gt;                               //表格结束</span><br></pre></td></tr></table></figure>

<h3 id="table标签特殊属性"><a href="#table标签特殊属性" class="headerlink" title="table标签特殊属性"></a>table标签特殊属性</h3><ul>
<li><p>cellspacing：单元格之间间距</p>
</li>
<li><p>cellpadding：单元格内内容和单元格边框的距离</p>
</li>
<li><p>frame：外部边框的显示</p>
</li>
<li><p>rules：内部标签的显示</p>
</li>
</ul>
<h3 id="tr标签特殊属性"><a href="#tr标签特殊属性" class="headerlink" title="tr标签特殊属性"></a>tr标签特殊属性</h3><table>
<thead>
<tr>
<th>属性</th>
<th>值</th>
<th>描述</th>
</tr>
</thead>
<tbody><tr>
<td>align</td>
<td>Left/center/right/justiy/char</td>
<td>行内容的水平对齐</td>
</tr>
<tr>
<td>Valign</td>
<td>top/middle/bottom/baseline</td>
<td>行内容的垂直对齐</td>
</tr>
<tr>
<td>Bgcolor</td>
<td>rgb/#xxxxxx/colorname</td>
<td>行的背景颜色</td>
</tr>
</tbody></table>
<p><code>&lt;td&gt;</code>和<code>&lt;th&gt;</code>常用标签属性类似与<code>&lt;tr&gt;</code></p>
<h2 id="表格布局"><a href="#表格布局" class="headerlink" title="表格布局"></a>表格布局</h2><ul>
<li><p>尽量少的使用表格嵌套</p>
</li>
<li><p>尽量少的使用表格跨行跨列</p>
</li>
</ul>
<p>说明：减少代码维护成本，使用表格进行网页布局一般不设置border</p>

      
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